Explanation

Since the resultant force on charge A is 0.024 N, and charge A is positive, the force must be attractive.

Charge C is negative, so the force due to charge C on charge A is attractive.

Therefore, the resultant force is toward charge C.

Explanation

The transformer works only on an AC supply

because A transformer needs an alternating current that will create a changing magnetic field

Note:

The transformer does not work on DC.

Direct current doesn't have a variable magnetic field

Explanation

The escape velocity of Neptune is approximately 23.5 km/s.

Explanation

Explanation

The incorrect statement is "Have higher wavelength than visible light."

X-rays actually have a shorter wavelength than visible light.

This making them more energetic and highly penetrating, especially in soft body tissues.

Explanation

The potential through which an electron should be accelerated to lift an atom's electron from the ground state to a higher state is known as excitation potential.

This energy excites the electron without completely removing it from the atom.

Explanation

When the velocity increases by 2 times and the radius increases by 4 times, the centripetal force remains the same.

This is because the increase in velocity squared (2^2 = 4) is balanced by the increase in radius (4r), resulting in no net change in the centripetal force.

So, the correct answer is:

F' = F

Explanation

Volt x Ampere is the measure of power.

Specifically, it represents electrical power in watts (W), where power (P) is calculated using the formula 

P=V×I, with V being voltage and I being current.

Explanation

SCR (Silicon Controlled Rectifier) is a unidirectional device.

It allows current to flow in only one direction, from anode to cathode.

It is controlled by a gate signal.

Explanation

The terminal voltage of a generator changes due to armature resistance.

The voltage drop across the armature resistance affects the terminal voltage as the load current varies.